cac chi tieu chu yeu ve kha nang lam viec cua truyen dong dai vit oc. lap cong thuc tinh truyen dong vit dai oc theo be mon, do ben va do on dinh

* cac chi tieu chu yeu va kha nang lam viec

3 chi tieu

- p0<= [po]( ap suat sinh ra tren mat ren nho hon ap suat cho phep0

-@td <= [@] ( us tuong duong sinh ra trong vit nho hon ung suat cho phep

-S0= Ftoihoan/ Fa >= [S] 9 he so an toan on dinh lon hon he so an toan cho phep

vat lieu vit va dai oc phai du ben dong thoi co h/s ma sat thap

* lap cong thuc tinh truyen dong vit dai oc

- theo do ben moi  

p0<= [p0]

p0 =Fa/At= Fa/(pi.d2.x.h)

x so vong ren dai oc x= H/p ( chieu cao dai oc' / buoc ren)

h chieu cao tinh toan cua ren

h= #h.p

suy ra p0 = Fa/(pi.d2.#h.p.H/p) = Fa/(pi.d2.#h.H) <= [p0]

#H=H/d2 suy ra H= #H.d2 

voi #H = 1,2 toi 1,5 dai oc nguyen

= 2,5 toi 3 dai oc ghep

suy ra p0= Fa/(pi.#h.#H.d2^2) <= [p0]

suy ra d2 >= can(Fa/(pi.#h.#H.[p0]))

* ve do ben

vit chiu  keo, nen , xoan

@td=can(@^2+3To^2)

"To la to dau nga o tren va 1 duong thang dung "

@ = Fa/A=4Fa/(pi.d1^2)

To= T/W0 =16T/(pi.d1^3)

* tinh on dinh

dk on dinh ole

- he so an toan on dinh S0= Fth/Fa >= [S0] = 2,5 toi 4

lam den day thui met rui hehehe